Liquid dosing device

Abstract

The utility model discloses a kind of liquid quantitative filling device, comprising: liquid injection tank and control unit, liquid injection tank includes tank body, liquid inlet pipe, liquid inlet valve, liquid outlet pipe and liquid outlet valve, liquid inlet pipe is used to inject liquid into tank body, liquid inlet valve is set on liquid inlet pipe, liquid outlet pipe is communicated tank body bottom, liquid outlet valve is set on liquid outlet pipe, liquid inlet valve and liquid outlet valve are electrically controlled valve;Control unit includes limiting shell, two collision switches, float ball and controller, limiting shell is fixedly arranged in tank body interior, limiting shell has water-permeable hole, two collision switches are arranged in limiting shell, two collision switches are connected with controller, controller is also connected with liquid inlet valve and liquid outlet valve, float ball is arranged in control cavity.Compared with prior art, the liquid quantitative control unit provided by the utility model has two collision switches and a float ball for triggering the collision switches, so that each time the liquid is filled, the amount between the two collision switches is filled, thereby realizing quantitative filling.

Description

Technical Field

[0001] This utility model relates to the field of feeding technology, specifically to a liquid metering device. Background Technology

[0002] Fertilizer production often requires the addition of liquids, such as water and pigments, at certain stages. Current production processes rely on manual, quantitative addition, which presents at least two problems: firstly, the amount added cannot be accurately controlled; and secondly, it wastes manpower. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a liquid quantitative dispensing device to solve the technical problem of inaccurate manual dispensing in the prior art.

[0004] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a liquid metering dispensing device, including: a liquid dispensing tank and a control unit. The liquid injection tank includes a tank body, an inlet pipe, an inlet valve, an outlet pipe, and an outlet valve. The inlet pipe is used to inject liquid into the tank body. The inlet valve is installed on the inlet pipe. The outlet pipe is connected to the bottom of the tank body. The outlet valve is installed on the outlet pipe. Both the inlet valve and the outlet valve are electrically controlled valves. The control unit includes a limiting shell, two collision switches, a float, and a controller. The limiting shell is fixedly installed inside the tank and has a water-permeable hole. The two collision switches are installed inside the limiting shell to enclose the control cavity. The two collision switches are connected to the controller, which is also connected to the inlet valve and the outlet valve. The float is installed inside the control cavity and floats in the liquid. The float can rise and fall with the liquid to hit and trigger the collision switches.

[0005] In some embodiments, the tank includes a cylindrical storage section, and the limiting shell is disposed vertically within the storage section.

[0006] In some embodiments, the collision switch includes a switch body, a waterproof membrane, and a wire. The waterproof membrane is elastic and covers the trigger end of the switch body. The switch body is connected to a controller via the wire.

[0007] In some embodiments, an adjustment unit is further included, which is drivenly connected to at least one of the collision switches to change the height of the collision switch.

[0008] In some embodiments, the collision switch includes an upper switch located above and a lower switch located below, the adjustment unit is kinetically connected to the upper switch, and the lower switch is fixedly connected to the limiting housing or tank.

[0009] In some embodiments, the adjustment unit includes a connecting plate and an adjuster. The connecting plate is fixedly connected to the tank body and has a threaded hole. The middle part of the adjuster has an external thread corresponding to the threaded hole. The lower end of the adjuster is connected to the upper switch by means of a protrusion embedded in a recess. The adjuster is rotatable relative to the upper switch and does not disengage.

[0010] In some embodiments, the adjustment unit further includes a fixed pulley disposed on the top of the tank, and the wire of the upper switch passes around the fixed pulley and is connected to a controller located outside the tank.

[0011] In some embodiments, a counterweight is provided on the portion of the upper switch's wire located outside the tank.

[0012] In some embodiments, the limiting housing has a limiting groove formed along its length, and the upper switch has a protrusion extending into the limiting groove. The limiting groove and the protrusion cooperate to limit the rotation range of the upper switch.

[0013] In some embodiments, the outer diameter of the float is 70% to 90% of the inner diameter of the limiting shell.

[0014] Compared with the prior art, the liquid quantitative dispensing device provided by this utility model has a control unit in the liquid dispensing tank. The control unit has two collision switches and a float for triggering the collision switches. The float floats on the liquid surface so that each liquid dispensing is the amount between the two collision switches, thereby realizing quantitative dispensing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the liquid metering dispensing device provided in an embodiment of the present invention; Figure 2 yes Figure 1 A partial structural diagram of the central control unit; Figure 3 These are top views of the limiting housing in some embodiments. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] To address the technical problem of inaccurate manual dispensing, this invention provides a liquid metering device that enables automated metering.

[0018] Please see Figure 1 and Figure 2 , Figure 1This is a schematic diagram of the liquid metering dispensing device provided in an embodiment of the present invention; Figure 2 yes Figure 1 A partial structural diagram of the control unit. The liquid metering device includes a liquid injection tank 1 and a control unit 2.

[0019] Liquid injection tank 1 includes a tank body 11, an inlet pipe 12, an inlet valve 13, an outlet pipe 14, and an outlet valve 15. The inlet pipe 12 is used to inject liquid into the tank body 11, and the inlet valve 13 is installed on the inlet pipe 12. The outlet pipe 13 connects to the bottom of the tank body 11, and the outlet valve 15 is installed on the outlet pipe 14. Both the inlet valve 13 and the outlet valve 15 are electrically controlled valves, and by controlling the inlet valve 13 and the outlet valve 15, the injection or discharge of liquid into the tank body 11 can be controlled.

[0020] The control unit 2 includes a limiting housing 21, two impact switches 22, a float 23, and a controller 24. The limiting housing 21 is fixedly installed inside the tank 11 and has a water-permeable hole for communicating with the liquid inside the tank 11. The two impact switches 22 are disposed inside the limiting housing 21 to enclose the control cavity. The two impact switches 22 are respectively connected to the controller 23, which is also connected to the inlet valve 13 and the outlet valve 14. The float 23 is disposed inside the control cavity and floats in the liquid, rising and falling with the liquid to impact and trigger the impact switches 22.

[0021] In some embodiments, the tank 11 includes a cylindrical storage section, and a limiting shell 21 is disposed vertically within the storage section. The cross-section of the storage section is the same at all heights, and the amount added is proportional to the height of the liquid level drop, which allows for better control of the amount added.

[0022] In some embodiments, the injection tank 1 further includes a support, a connecting plate, hooks, and other connecting structures for fixing the tank 11 to a suitable position on the production equipment. This application does not limit the specific form of the connecting structure; those skilled in the art can flexibly choose according to actual needs, as long as the fixing function can be achieved.

[0023] In some embodiments, the limiting shell 21 is fixedly connected to the inner wall of the tank 11, and the tank 11 can form a control cavity by itself or by surrounding the tank 11 to form a control cavity.

[0024] In some embodiments, the collision switch 22 includes a switch body 221, a waterproof membrane 222, and a wire 223. The waterproof membrane 222 is elastic and covers the trigger end of the switch body 221. The switch body 221 is connected to the controller 24 via the wire 223. Obviously, the wire 223 also needs to be waterproofed.

[0025] In some embodiments, in order for the float 23 to move smoothly within the limiting housing 21, the outer diameter of the float 23 is smaller than the inner diameter of the limiting housing 21 to create a gap. At the same time, in order for the float 23 to strike the trigger end of the switch body 221, the size of the float 23 cannot be too small. Therefore, preferably, the outer diameter of the float 23 is 70% to 90% of the inner diameter of the limiting housing 21.

[0026] In some embodiments, the liquid metering device further includes an adjustment unit 3, which is connected to at least one of the collision switches 22 to change the height of the collision switch 22. That is, it adjusts the distance between the two collision switches 22 to change the single dispensing volume of the liquid.

[0027] In some embodiments, the collision switch 22 includes an upper switch 22a located above and a lower switch 22b located below. The adjustment unit 3 is kinetically connected to the upper switch 22a, and the lower switch 22b is fixedly connected to the limiting housing 21 or the tank body 11. The position of the upper switch 22a makes it easier to arrange the adjustment unit 3 and perform height adjustment.

[0028] In some embodiments, the adjusting unit 3 includes a connecting plate 31 and an adjuster 32. The connecting plate 31 is fixedly connected to the tank body 11 and has a threaded hole. The adjuster 32 has an external thread corresponding to the threaded hole in its middle portion. The adjuster 32 is arranged parallel to the axis of the limiting housing 21, i.e., vertically positioned and engaged with and passing through the threaded hole. The lower end of the adjuster 32 is engaged with the upper switch 22a by means of a protrusion embedded in a recess. The adjuster 32 is rotatable relative to the upper switch 22a and does not disengage. Preferably, the upper end of the adjuster 32 forms a handle, which can drive the upper switch 22a up and down by rotating the adjuster 32.

[0029] like Figure 3 As shown, Figure 3 This is a top view of the limiting housing in some embodiments. In some embodiments, the limiting housing 21 has a limiting groove formed along its length, and the upper switch 22a has a protrusion 224 extending into the limiting groove. The limiting groove and the protrusion cooperate to limit the rotation range of the upper switch 22a. If the rotation range of the upper switch 22a is not limited, the wires of the upper switch 22a will become tangled, affecting the service life of the wires. Therefore, in a preferred embodiment, by providing a cooperating limiting groove and protrusion 224, the upper switch 22a can only rotate within a small range, avoiding the tangling of the wires.

[0030] In some embodiments, the adjustment unit 3 further includes a fixed pulley 33 disposed on the top of the tank body, and the wire of the upper switch 22a passes around the fixed pulley 33 and is connected to the controller 24 located outside the tank body 11. The fixed pulley 33 can prevent the wire from rubbing against the edge of the tank body 11, thus extending the service life of the wire.

[0031] In some embodiments, a counterweight 4 is provided on the portion of the upper switch 22a's wire located outside the tank 11. The counterweight 4 straightens the portion of the wire inside the tank 11, keeping the excess portion outside the tank 11 and preventing the wire from tangling. It should be noted that the counterweight 4 should not be too heavy; it should only be heavy enough to pull the excess portion of the wire out of the tank 11. An excessively heavy counterweight 4 will also shorten the lifespan of the wire.

[0032] To better understand this utility model, the following is combined with... Figures 1 to 3 The technical solution of this utility model is described in detail below: In use, the inlet pipe 12 and outlet pipe 14 are used to inject and discharge liquid into the tank 11, respectively. The inlet pipe 12 is also connected to a liquid supply device, and the outlet pipe 14 faces the production equipment that requires liquid. The controller 24 is also connected to the control system of the production equipment. When liquid needs to be added, the control system of the production equipment sends a signal to the controller 24, which controls the outlet valve 15 to open, allowing liquid to be added through the outlet pipe 14. The float 23 descends with the liquid level until it collides and triggers the lower switch 22b. The lower switch 22b sends a signal to the controller 24, which controls the outlet valve 15 to close, stopping the liquid addition. The amount of liquid added in this instance is the amount of liquid between the two collision switches 22, achieving quantitative addition.

[0033] The controller 24 also controls the opening of the inlet valve 13 to replenish liquid into the tank 11 through the inlet pipe 12. The float 23 rises with the liquid level until it hits and triggers the upper switch 22a. The upper switch 22a sends a signal to the controller 24, which then controls the inlet valve 13 to close, stopping the replenishment of liquid. This process constitutes one filling cycle, and the process is repeated for the next filling.

[0034] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A liquid metering dispensing device, characterized in that, include: The liquid injection tank includes a tank body, an inlet pipe, an inlet valve, an outlet pipe, and an outlet valve. The inlet pipe is used to inject liquid into the tank body. The inlet valve is installed on the inlet pipe. The outlet pipe is connected to the bottom of the tank body. The outlet valve is installed on the outlet pipe. Both the inlet valve and the outlet valve are electrically controlled valves. The control unit includes a limiting shell, two collision switches, a float, and a controller. The limiting shell is fixedly installed inside the tank and has a water-permeable hole. The two collision switches are installed inside the limiting shell to enclose the control cavity. The two collision switches are connected to the controller, which is also connected to the inlet valve and the outlet valve. The float is installed inside the control cavity and floats in the liquid. The float can hit and trigger the collision switches as the liquid rises and falls.

2. The liquid metering dispensing device according to claim 1, characterized in that, The tank includes a cylindrical storage section, and the limiting shell is disposed vertically within the storage section.

3. The liquid metering dispensing device according to claim 1, characterized in that, The collision switch includes a switch body, a waterproof membrane, and wires. The waterproof membrane is elastic and covers the trigger end of the switch body. The switch body is connected to a controller via wires.

4. The liquid metering dispensing device according to claim 1, characterized in that, It also includes an adjustment unit, which is drivenly connected to at least one of the collision switches to change the height of the collision switch.

5. The liquid metering dispensing device according to claim 4, characterized in that, The collision switch includes an upper switch located at the top and a lower switch located at the bottom. The adjustment unit is drivenly connected to the upper switch, and the lower switch is fixedly connected to the limiting shell or tank.

6. The liquid metering dispensing device according to claim 5, characterized in that, The adjustment unit includes a connecting plate and an adjuster. The connecting plate is fixedly connected to the tank body and has a threaded hole. The middle part of the adjuster has an external thread corresponding to the threaded hole. The lower end of the adjuster is connected to the upper switch by means of a protrusion embedded in a recess. The adjuster is rotatable relative to the upper switch and does not detach.

7. The liquid metering dispensing device according to claim 6, characterized in that, The adjustment unit also includes a fixed pulley located on the top of the tank, and the wire of the upper switch passes around the fixed pulley and is connected to a controller located outside the tank.

8. The liquid metering dispensing device according to claim 7, characterized in that, The portion of the upper switch's wire located outside the tank is equipped with a counterweight.

9. The liquid metering dispensing device according to claim 6, characterized in that, The limiting housing has a limiting groove along its length, and the upper switch has a protrusion that extends into the limiting groove. The limiting groove and the protrusion cooperate to limit the rotation range of the upper switch.

10. The liquid metering dispensing device according to claim 1, characterized in that, The outer diameter of the float is 70% to 90% of the inner diameter of the limiting shell.

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